2163347920 has 160 divisors (see below), whose sum is σ = 5492460960. Its totient is φ = 789381120.

The previous prime is 2163347917. The next prime is 2163347933. The reversal of 2163347920 is 297433612.

It can be written as a sum of positive squares in 16 ways, for example, as 512388496 + 1650959424 = 22636^2 + 40632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2163347920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7383294 + ... + 7383586.

It is an arithmetic number, because the mean of its divisors is an integer number (34327881).

Almost surely, 2^2163347920 is an apocalyptic number.

2163347920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163347920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2746230480).

2163347920 is an abundant number, since it is smaller than the sum of its proper divisors (3329113040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2163347920 is a wasteful number, since it uses less digits than its factorization.

2163347920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 2163347920 is about 46511.8040931547. The cubic root of 2163347920 is about 1293.3283280589.

The spelling of 2163347920 in words is "two billion, one hundred sixty-three million, three hundred forty-seven thousand, nine hundred twenty".